Basic timer for Unity Engine.

Timer.cs

//************** REAL GAMES STUDIO ***************
//************************************************
//realgamesss.weebly.com
//gamejolt.com/@Real_Game
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//************************************************
using UnityEngine;
using TMPro;

public class Timer : MonoBehaviour
{
    public TextMeshProUGUI timer;

    void Update()
    {
        timer.text = FormatTime(Time.time);
    }

    string FormatTime(float time)
    {
        int intTime = (int)time;
        int minutes = intTime / 60;
        int seconds = intTime % 60;
        float fraction = time * 1000;
        fraction = (fraction % 1000);
        string timeText = string.Format("{0:00}:{1:00}:{2:000}", minutes, seconds, fraction);
        return timeText;
    }
}